Hi,
SXG 75 isNON Siemens Brand (ODM Phones) - Qualcomm. So, you need to use the specific tools (QPST - flashing, QXDM - full Edit of NV items or NV Editor). Download from:
http://rapidshare.com/files/66410414/qpst-2.7b215.zip
http://rapidshare.com/files/86410122/QXDM3.9.10.rar
http://rapidshare.com/files/87371684/SetupNVEdit.zip
Place your request in the NON Siemens brand (because NOT is ...), and is possible to have response.
Br,
dagos